Systems, Methods, and Apparatuses for Spectrum-Sensing Cognitive Radios
First Claim
1. A cognitive radio system, comprising:
- at least one antenna;
a radio front-end module in communication with the at least one antenna and configured to transmit and receive radio frequency signals via the at least one antenna;
a spectrum-sensing module in communication with the at least one antenna and configured to generate radio frequency spectrum usage information; and
a medium access control (MAC) module operative to receive the RF spectrum usage information from the spectrum-sensing module, wherein the MAC module is operative to direct a frequency of operation of the radio front-end module based at least in part on the received spectrum usage information.
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Accused Products
Abstract
Systems, methods, and apparatuses are provided for spectrum-sensing cognitive radios that are operative to detect and utilize available RF spectrum resources. The spectrum-sensing cognitive radios include at least one antenna and a frequency-agile radio front-end module in communication with the at least one antenna and configured to transmit and receive radio frequency signals via the at least one antenna. In addition, a spectrum-sensing module, which may include one or both of coarse-sensing and fine-sensing modules, may be in communication with the at least one antenna and be configured to generate RF spectrum usage information. A medium access control (MAC) module is operative to receive the RF spectrum usage information from the spectrum-sensing module. Based upon the received RF spectrum usage information, the MAC module is operative to direct a frequency of operation of the radio front-end module based at least in part on the received spectrum usage information.
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Citations
20 Claims
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1. A cognitive radio system, comprising:
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at least one antenna;
a radio front-end module in communication with the at least one antenna and configured to transmit and receive radio frequency signals via the at least one antenna;
a spectrum-sensing module in communication with the at least one antenna and configured to generate radio frequency spectrum usage information; and
a medium access control (MAC) module operative to receive the RF spectrum usage information from the spectrum-sensing module, wherein the MAC module is operative to direct a frequency of operation of the radio front-end module based at least in part on the received spectrum usage information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for implementing a cognitive radio system, comprising:
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receiving radio signals at a spectrum-sensing module;
generating via the spectrum-sensing module, spectrum information based at least in part on the received radio signals;
receiving the spectrum information at a medium access control module;
determining via the medium access control module, a non-occupied spectrum based at least in part upon the spectrum information; and
reconfiguring a transceiver to operate in the non-occupied spectrum. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A spectrum sensing system, comprising:
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a coarse-sensing module that utilizes a wavelet transform to generate a signal indicative of spectrum usage;
a spectrum recognition module in communication with the coarse sensing module that determines an occupied spectrum segment based at least partially on the signal from the course sensing module; and
a fine-sensing module that generates a signal indicative of a feature of a signal type for an occupied spectrum segment identified by the spectrum recognition module. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification